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In most regions, you can use two SIM cards on Galaxy S10, S10+, and S10e if you choose not to use a micro SD card.

The dual-SIM version of Galaxy S10 can work in dual-standby mode. The two SIM cards share (time sharing) one modem and therefore the dual SIM version of Galaxy S10 does not support dual active mode.

This Galaxy S10 how-to guide explains how to use two SIM cards on Galaxy S10, S10+, and S10e, how to enable and use dual SIM always on and how to use SIM card manager to set preferred SIM cards for calls, messages, and mobile data.

Who can use two SIM cards on Galaxy S10, S10+, and S10e?

You can use two SIM cards concurrently. In some countries, some carriers charge excessively for mobile data if the SIM card can also make calls. Some bundle very limited mobile data with voice plans. In this case, you can use one SIM card for calls, one for mobile data.

Or when traveling, you can use one SIM card issued in your home country and the other one from a local carrier. In this way will not miss important calls and messages without paying excessive roaming voice and data fees.

You can also use one SIM card for work-related communications, and the other for private affairs.

To use two SIM cards on Galaxy S10, you need to have a dual SIM version of Galaxy S10. As mentioned, unless you bought Galaxy S10 in North America, your Galaxy S10 (S10, S10+, and S10e) is very likely the dual SIM version.

How to check whether the Galaxy S10 is a dual SIM version or a single SIM version?

The limitations of Galaxy S10 dual SIM capabilities

For dual SIM phones, there are two variants: dual standby, and dual active, as explained in this guide.

In a nutshell, dual-SIM dual-standby (DSDS) means the two SIM cards share one set of modem and antenna. The time-sharing (similar to virtualization) is implemented in the software, and the user should not notice it when both SIM cards are in … Read the rest

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